Shield against contamination with the Keystone SANI-BT Clear Polyethylene Boot CoversExperience protection and safety with the cost-efficient "Keystone SANI-BT Clear Polyethylene Boot Covers". These skid resistant and water proof covers are clean room compatible and ensure that you avoid all risk of contamination while working at secure facilities. Made from premium-quality polyethylene, this protective gear is sturdy and durable and can be used for long hours comfortably. These shoes covers are available in XL (16" x 20") size to give you a comfortable fit. The color of the shoe covers is clear. Now comply with safety regulations in your work place by using these protective covers.